The expression is
The base is t.
The exponent is 4.
means t to the fourth power
\\
means t to the fourth power.
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=dabd44882ebf09e3df3c609e2821e535.png\")
![\"\"](\"/userfiles/image/steps_images/step2.JPG\")
![\"\"](\"http://c4anything.com/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=dabd44882ebf09e3df3c609e2821e535.png\")
means t to the fourth power![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e1643e2a879716b7cc3c94ce1e3aad5e.png\")
![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
\\
means t to the fourth power.